Google is rolling out a major update for Gmail, adding tabs to the top of your inbox to automatically categorize smart labels such as promotions and social updates.

According to the official Gmail blog, you'll be able to select which categories will be enabled as tabs (Social, Promotions, Updates, or Forums, as well as "Primary" for your classic inbox). The tabs will show you how many new emails you have for each category and offer another way to organize your inbox. You'll be able to drag-and-drop messages between tabs and set specific senders to always appear in a certain tab.

Don't worry if this isn't to your liking (it might not be if you prefer the Priority Inbox or other non-default Gmail view, which the tabs won't work with). You'll be able to turn off this tabbed view if you wish.

The feature is rolling out gradually on the desktop and is coming to Android and iOS apps as well over the next few weeks (on mobile, the tabs will slide in from the side). If you'd like to enable this sooner, keep an eye on the gear menu for the "Configure Inbox" option in Settings when it's available.